MAX31850TATB+

The MAX31850TATB+ is a cold-junction compensated, 1-wire thermocouple to digital converter in 10 pin TDFN package. This sophisticated thermocouple to digital converter includes a built-in 14bit analogue to digital converter (ADC), cold-junction compensation sensing and correction, a digital controller, a 1-wire data interface and associated control logic. The 1-wire bus by definition requires only one data line and ground connection for communication with a central microcontroller. The data line requires a weak pull-up resistor since device is linked to the bus through a three-state or open-drain port. Four location address inputs simplify mapping of device to specific locations. This device has a unique 64bit serial code which allows multiple units to function on the same 1-wire bus. Hence it is simple to use one microcontroller (the master device) to monitor temperature from many thermocouples distributed over a large area.

• Supply voltage range is 3V to 3.7V
• Integration reduces design time and lowers system cost
• 14bit, 0.25°C resolution
• Measured temperature range from -270°C to +400°C
• Accuracy range of ±2°C
• Detects thermocouple shorts to GND or VDD
• Detects open thermocouple
• 1-wire multiddrop capability simplifies multisensor systems

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